1 (* Copyright (C) 2004-2005, HELM Team.
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4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
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28 module Ast = CicNotationPt
30 let visit_ast ?(special_k = fun _ -> assert false) k =
31 let rec aux = function
32 | Ast.Appl terms -> Ast.Appl (List.map k terms)
33 | Ast.Binder (kind, var, body) ->
34 Ast.Binder (kind, aux_capture_variable var, k body)
35 | Ast.Case (term, indtype, typ, patterns) ->
36 Ast.Case (k term, indtype, aux_opt typ, aux_patterns patterns)
37 | Ast.Cast (t1, t2) -> Ast.Cast (k t1, k t2)
38 | Ast.LetIn (var, t1, t2) ->
39 Ast.LetIn (aux_capture_variable var, k t1, k t2)
40 | Ast.LetRec (kind, definitions, term) ->
43 (fun (params, var, ty, decrno) ->
44 List.map aux_capture_variable params, aux_capture_variable var,
48 Ast.LetRec (kind, definitions, k term)
49 | Ast.Ident (name, Some substs) ->
50 Ast.Ident (name, Some (aux_substs substs))
51 | Ast.Uri (name, Some substs) -> Ast.Uri (name, Some (aux_substs substs))
52 | Ast.Meta (index, substs) -> Ast.Meta (index, List.map aux_opt substs)
53 | (Ast.AttributedTerm _
57 | Ast.Variable _) as t -> special_k t
64 | Ast.UserInput) as t -> t
65 and aux_opt = function
67 | Some term -> Some (k term)
68 and aux_capture_variable (term, typ_opt) = k term, aux_opt typ_opt
69 and aux_patterns patterns = List.map aux_pattern patterns
70 and aux_pattern ((head, hrefs, vars), term) =
71 ((head, hrefs, List.map aux_capture_variable vars), k term)
72 and aux_subst (name, term) = (name, k term)
73 and aux_substs substs = List.map aux_subst substs
77 let visit_layout k = function
78 | Ast.Sub (t1, t2) -> Ast.Sub (k t1, k t2)
79 | Ast.Sup (t1, t2) -> Ast.Sup (k t1, k t2)
80 | Ast.Below (t1, t2) -> Ast.Below (k t1, k t2)
81 | Ast.Above (t1, t2) -> Ast.Above (k t1, k t2)
82 | Ast.Over (t1, t2) -> Ast.Over (k t1, k t2)
83 | Ast.Atop (t1, t2) -> Ast.Atop (k t1, k t2)
84 | Ast.Frac (t1, t2) -> Ast.Frac (k t1, k t2)
85 | Ast.Sqrt t -> Ast.Sqrt (k t)
86 | Ast.Root (arg, index) -> Ast.Root (k arg, k index)
87 | Ast.Break -> Ast.Break
88 | Ast.Box (kind, terms) -> Ast.Box (kind, List.map k terms)
89 | Ast.Group terms -> Ast.Group (List.map k terms)
91 let visit_magic k = function
92 | Ast.List0 (t, l) -> Ast.List0 (k t, l)
93 | Ast.List1 (t, l) -> Ast.List1 (k t, l)
94 | Ast.Opt t -> Ast.Opt (k t)
95 | Ast.Fold (kind, t1, names, t2) -> Ast.Fold (kind, k t1, names, k t2)
96 | Ast.Default (t1, t2) -> Ast.Default (k t1, k t2)
97 | Ast.If (t1, t2, t3) -> Ast.If (k t1, k t2, k t3)
98 | Ast.Fail -> Ast.Fail
100 let visit_variable k = function
104 | Ast.FreshVar _ as t -> t
105 | Ast.Ascription (t, s) -> Ast.Ascription (k t, s)
107 let variables_of_term t =
108 let rec vars = ref [] in
110 if List.mem v !vars then ()
111 else vars := v :: !vars
113 let rec aux = function
114 | Ast.Magic m -> Ast.Magic (visit_magic aux m)
115 | Ast.Layout l -> Ast.Layout (visit_layout aux l)
116 | Ast.Variable v -> Ast.Variable (aux_variable v)
117 | Ast.Literal _ as t -> t
118 | Ast.AttributedTerm (_, t) -> aux t
119 | t -> visit_ast aux t
120 and aux_variable = function
123 | Ast.TermVar _) as t ->
126 | Ast.FreshVar _ as t -> t
127 | Ast.Ascription _ -> assert false
132 let names_of_term t =
139 List.map aux (variables_of_term t)
141 let keywords_of_term t =
142 let rec keywords = ref [] in
143 let add_keyword k = keywords := k :: !keywords in
144 let rec aux = function
145 | Ast.AttributedTerm (_, t) -> aux t
146 | Ast.Layout l -> Ast.Layout (visit_layout aux l)
147 | Ast.Literal (`Keyword k) as t ->
150 | Ast.Literal _ as t -> t
151 | Ast.Magic m -> Ast.Magic (visit_magic aux m)
152 | Ast.Variable _ as v -> v
153 | t -> visit_ast aux t
158 let rec strip_attributes t =
159 let special_k = function
160 | Ast.AttributedTerm (_, term) -> strip_attributes term
161 | Ast.Magic m -> Ast.Magic (visit_magic strip_attributes m)
162 | Ast.Variable _ as t -> t
165 visit_ast ~special_k strip_attributes t
169 | Ast.AttributedTerm (`IdRef id, t) -> id :: get_idrefs t
170 | Ast.AttributedTerm (_, t) -> get_idrefs t
173 let meta_names_of_term term =
174 let rec names = ref [] in
176 if List.mem n !names then ()
177 else names := n :: !names
179 let rec aux = function
180 | Ast.AttributedTerm (_, term) -> aux term
181 | Ast.Appl terms -> List.iter aux terms
182 | Ast.Binder (_, _, body) -> aux body
183 | Ast.Case (term, indty, outty_opt, patterns) ->
186 List.iter aux_branch patterns
187 | Ast.LetIn (_, t1, t2) ->
190 | Ast.LetRec (_, definitions, body) ->
191 List.iter aux_definition definitions ;
193 | Ast.Uri (_, Some substs) -> aux_substs substs
194 | Ast.Ident (_, Some substs) -> aux_substs substs
195 | Ast.Meta (_, substs) -> aux_meta_substs substs
203 | Ast.UserInput -> ()
205 | Ast.Magic magic -> aux_magic magic
206 | Ast.Variable var -> aux_variable var
209 and aux_opt = function
210 | Some term -> aux term
212 and aux_capture_var (_, ty_opt) = aux_opt ty_opt
213 and aux_branch (pattern, term) =
214 aux_pattern pattern ;
216 and aux_pattern (head, _, vars) =
217 List.iter aux_capture_var vars
218 and aux_definition (params, var, term, decrno) =
219 List.iter aux_capture_var params ;
220 aux_capture_var var ;
222 and aux_substs substs = List.iter (fun (_, term) -> aux term) substs
223 and aux_meta_substs meta_substs = List.iter aux_opt meta_substs
224 and aux_variable = function
225 | Ast.NumVar name -> add_name name
226 | Ast.IdentVar name -> add_name name
227 | Ast.TermVar name -> add_name name
228 | Ast.FreshVar _ -> ()
229 | Ast.Ascription _ -> assert false
230 and aux_magic = function
231 | Ast.Default (t1, t2)
232 | Ast.Fold (_, t1, _, t2) ->
235 | Ast.If (t1, t2, t3) ->
245 let rectangular matrix =
246 let columns = Array.length matrix.(0) in
248 Array.iter (fun a -> if Array.length a <> columns then raise Exit) matrix;
253 let matrix = Array.of_list (List.map Array.of_list ll) in
254 assert (rectangular matrix);
255 let rows = Array.length matrix in
256 let columns = Array.length matrix.(0) in
257 let lists = ref [] in
258 for j = 0 to columns - 1 do
260 for i = 0 to rows - 1 do
261 l := matrix.(i).(j) :: !l
263 lists := List.rev !l :: !lists
267 let string_of_literal = function
272 let boxify = function
274 | l -> Ast.Layout (Ast.Box ((Ast.H, false, false), l))
276 let unboxify = function
277 | Ast.Layout (Ast.Box ((Ast.H, false, false), [ a ])) -> a
282 | l -> Ast.Layout (Ast.Group l)
288 | Ast.Layout (Ast.Group terms) :: terms' -> aux acc (terms @ terms')
289 | term :: terms -> aux (term :: acc) terms
293 let dress ~sep:sauce =
298 | hd :: tl -> hd :: sauce :: aux tl
302 let dressn ~sep:sauces =
307 | hd :: tl -> hd :: sauces @ aux tl
311 let find_appl_pattern_uris ap =
314 | Ast.UriPattern uri -> uri :: acc
315 | Ast.ImplicitPattern
316 | Ast.VarPattern _ -> acc
317 | Ast.ApplPattern apl -> List.fold_left aux acc apl
319 let uris = aux [] ap in
320 HExtlib.list_uniq (List.fast_sort UriManager.compare uris)
322 let rec find_branch =
324 Ast.Magic (Ast.If (_, Ast.Magic Ast.Fail, t)) -> find_branch t
325 | Ast.Magic (Ast.If (_, t, _)) -> find_branch t
328 let cic_name_of_name = function
329 | Ast.Ident ("_", None) -> Cic.Anonymous
330 | Ast.Ident (name, None) -> Cic.Name name
333 let name_of_cic_name =
334 (* let add_dummy_xref t = Ast.AttributedTerm (`IdRef "", t) in *)
335 (* ZACK why we used to generate dummy xrefs? *)
336 let add_dummy_xref t = t in
338 | Cic.Name s -> add_dummy_xref (Ast.Ident (s, None))
339 | Cic.Anonymous -> add_dummy_xref (Ast.Ident ("_", None))
341 let fresh_index = ref ~-1
343 type notation_id = int
349 (* TODO ensure that names generated by fresh_var do not clash with user's *)
350 let fresh_name () = "fresh" ^ string_of_int (fresh_id ())
352 let rec freshen_term ?(index = ref 0) term =
353 let freshen_term = freshen_term ~index in
354 let fresh_instance () = incr index; !index in
355 let special_k = function
356 | Ast.AttributedTerm (attr, t) -> Ast.AttributedTerm (attr, freshen_term t)
357 | Ast.Layout l -> Ast.Layout (visit_layout freshen_term l)
358 | Ast.Magic m -> Ast.Magic (visit_magic freshen_term m)
359 | Ast.Variable v -> Ast.Variable (visit_variable freshen_term v)
360 | Ast.Literal _ as t -> t
364 | Ast.Symbol (s, instance) -> Ast.Symbol (s, fresh_instance ())
365 | Ast.Num (s, instance) -> Ast.Num (s, fresh_instance ())
366 | t -> visit_ast ~special_k freshen_term t
368 let freshen_obj obj =
370 let freshen_term = freshen_term ~index in
371 let freshen_name_ty = List.map (fun (n, t) -> (n, freshen_term t)) in
372 let freshen_name_ty_b = List.map (fun (n,t,b,i) -> (n,freshen_term t,b,i)) in
373 let freshen_capture_variables =
374 List.map (fun (n,t) -> (freshen_term n, HExtlib.map_option freshen_term t))
377 | CicNotationPt.Inductive (params, indtypes) ->
380 (fun (n, co, ty, ctors) -> (n, co, ty, freshen_name_ty ctors))
383 CicNotationPt.Inductive (freshen_capture_variables params, indtypes)
384 | CicNotationPt.Theorem (flav, n, t, ty_opt) ->
386 match ty_opt with None -> None | Some ty -> Some (freshen_term ty)
388 CicNotationPt.Theorem (flav, n, freshen_term t, ty_opt)
389 | CicNotationPt.Record (params, n, ty, fields) ->
390 CicNotationPt.Record (freshen_capture_variables params, n,
391 freshen_term ty, freshen_name_ty_b fields)
393 let freshen_term = freshen_term ?index:None